Amplitude-modulated tones and random-phase harmonic complexes define the two test stimulus families.

Evidence

The stimuli used by Santurette and Dau ( 2011 ) and by Oxenham et al. ( 2011 ) have been generated and processed through the simulation. In Santurette and Dau ( 2011 ), the signals were generated by multiplying a pure tone carrier with frequency fc with a half-wave rectified sine wave modulator with modulation frequency fenv and low-pass filtered by a 4th order Butterworth filter with cut-off frequency of 0.2 × fc . All signals were generated at 50 dB SPL and mixed with a TEN noise at 34 dB SPL per ERB. All fc and fenv values are indicated in Fig. 2 . When fc and fenv are not multiple from each other, this manipulation produce a shifted complex. In Oxenham et al. ( 2011 ), harmonic complex tones at various F0 values (indicated in Fig. 3 ) were generated by adding in random phase up to 12 consecutive harmonics, beginning on the sixth. Harmonics above 20 kHz were not generated. All harmonics were generated at 55 dB SPL per component and all signals were embedded in a broadband TEN noise at 45 dB per ERB. A shifted version of each harmonic complex tone was also generated by shifting all components of the complex tone by an amount of 0.5 × F0. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4633

Categorization

Category: Factual Claims

• DEFINE: Describes exactly how the Santurette-Dau AM-tones and Oxenham harmonic complexes were constructed, including noise masking levels.

Related

• Amplitude-modulated tones whose modulator and carrier frequencies are non-integer multiples produce a shifted spectrum. (similarity 0.82)

Broader Connections

• An amplitude-modulated tone produces a three-line spectrum #expands (0.85) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 74
• Pitch strength of amplitude-modulated tones depends critically on the carrier-to-modulation frequency ratio #expands (0.75) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 816